GCN Circular 5218
Subject
GRB 060604: redshift
Date
2006-06-05T12:24:51Z (18 years ago)
From
Alberto Castro-Tirado at Inst.de Astro. de Andalucia <ajct@iaa.es>
A. J. Castro-Tirado, P. Amado (IAA-CSIC Granada),
I. Negueruela (U. de Alicante), J. Gorosabel, M. Jel�nek
and A. de Ugarte Postigo (IAA-CSIC),
report:
"We have observed the optical afterglow of GRB 060604 (Page et al.
GCN Circ. 5212) with the 2.5m Nordic Optical telescope (+ALFOSC)
at Observatorio del Roque de los Muchachos (La Palma). Observations
consisted of a 150 s V-band exposure with showed a faint object at
the location of the proposed Swift/UVOT candidate, in agreement with
Tanvir et al. (GCN Circ. 5216), plus a 1200 s exposure spectrum
covering the range 3200-9100 A with the grism#4. Based on the presence
of a strong continuum break around 4475 A which we identify as due to
Ly-alpha, we estimate a redshift of z = 2.68. Further analysis is in
progress"
This message is citeable.